Fluke 323
#5 in AC onlyFull review
A simple, well-built true-RMS AC clamp for electricians who want a Fluke for everyday panel and circuit checks.
Amazon $152.85$152.85
400 ANoCAT IV 300 V / CAT III 600 V
2.8/5
A basic AC clamp for household circuits, with the fewest published specs in this list.
- 400 AAC current
- NoDC current
- CAT III 600 VSafety
Check price at Amazon$65.81
Price checked November 9, 2026. As an Amazon Associate we earn from qualifying purchases.
Pros
- Built-in non-contact voltage tester
- Third-hand probe holder frees a hand while you test
Cons
- AC current only, and the listing does not say it is true RMS
- Jaw size, accuracy and warranty are not published on the listing
How it scores
The rating comes from 8 measured or published factors, each scored 0-100 against fixed reference points for its type. How we rank explains each one.
Specifications
| Model number | 21510N |
|---|---|
| Measurement | |
| AC current (jaw) | 400 A |
| DC current (jaw) | No |
| Safety | |
| CAT rating | CAT III 600 V |
| Features | |
| Non-contact voltage | Yes |
Alternatives in this type
Fluke 302+
#6 in AC onlyFull review
A basic AC clamp for occasional current checks on plain resistive and motor loads, at an entry price.
Amazon $88$88
400 ANoCAT IV 300 V / CAT III 600 V
Klein Tools CL120
#7 in AC onlyFull review
An inexpensive AC clamp for homeowners and apprentices who need occasional current and voltage checks.
Amazon $63.89$63.89
400 ANoCAT III 600 V
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